Well iv'e been meaning to do this for a while and also thought i would clean up the motor while i was there too. Unfortunately i don't have any pictures of the motor before clean up.
At least i can now use this without worrying about it going pop
Whilst removing the suppressor won't have any immediate ill effects (apart from probably generating LOADS of radio interference), you can expect more arcing at the brushes, with consequently faster brush wear, and more commutator burning. Keep an eye on it